The Seattle rap duo Macklemore & Ryan Lewis have already snagged two No. 1 hits with ''Can't Hold Us'' and ''Thrift Shop.'' And now their gay-equality anthem ''Same Love'' (featuring vocals by Mary Lambert) is working its way up the charts without even being released as a single. Radio stations have been playing the song by popular demand, and thanks to fervent grassroots support from fans, ''Love'' is set to be released as the duo's third single from their 2012 debut, The Heist. Written around the time Washington State legalized gay marriage last year, ''Love'' takes aim at the all-too-common homophobia in rap songs. ''As a straight male, how do I write a pro-gay song? I struggled with that for a while,'' says Mackle-more, who grew up with two gay uncles. ''And then I got it: Just talk about my own perspective and experiences growing up.'' The rest is chart history.